Preheat the oven to 220°C
Peel your potatoes and chop them into roughly even chunks about 2 inches in size
Rinse your potatoes under cold water to remove excess starch before placing into a stockpot and covering with salted cold water
Place over a high heat and bring to the boil before turning down and simmering for 8-9 minutes
Add your goose fat to a roasting tin and place in the oven for 10 minutes until melted and simmering hot
Drain the potatoes using a colander before adding the flour and shaking to roughen up the edges - they will fall apart a bit!
Remove the roasting tin from the oven and carefully place your potatoes into the fat using tongs
Turn potatoes so they're coated in the fat and return to the oven for 25 minutes
Turn the potatoes and place back in the oven for another 25 minutes
One final turn and place back in the oven for another 10 minutes or until golden brown
Remove from the oven and place on a piece of kitchen towel to absorb excess fat before placing into a bowl for serving and sprinkling with the salt flakes and thyme